Automatic lens-drilling attachment.



G. G. WORSTALL.

AUTOMATIC LENS DRILLING ATTACHMENT.

APPLICATION FILED MAY23.191G.

1,222,506. Patented A r.10, 1917.

Witnesses Attorneys GEORGE G. WORSTALL, 0F TOMS RIVER, NEW JERSEY.

AUTOMATIC LENS-DRILLING ATTACHMENT.

Specification of Letters Patent.

Patented Apr. 10, 1917.

Application filed May 23, 1916. Serial No. 99,418.

To all whom it may concern: 1

Be it known that I, Grouse G. WVoRsTALL, a citizen of the United States, residing at Toms River, in the county of Ocean and State of New Jersey, have invented a new and useful Automatic Lens-Drilling Attachment, of which the following is a specification.

The present invention is a lens drilling attachment for a lathe such as used by watch makers and oculists, and aims to provide a novel and improved device of that nature having means for holding a lens and for adjustin it, in order that an aperture can be 'drille at the proper point of the lens for the attachment of the bridge, the present device being especially intended for drilling the lenses of eye glasses or spectacles.

It is the ob ect of the invention toprovide an attachment of the character specified of comparatively simple and inexpensive construction, which can be conveniently used upon a lathe for drilling an aperture in a lens, the device having means for the adjust- -ment of the lens, and for advancing the lens against the drill and for retracting it.

With the foregoing and other ob ects in "view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within' the scope of What is claimed without departin from the spirit of the invention.

he invention is illustrated-in the accompanying drawing, wherein Flgure 1 is a side elevation of the device;

Fig. 2 is another elevation thereof looking at right angles to the line of view in Fig. 1.

Fig. 3 is a sectional detail taken on the line 3-3 of Fig. 1.

Fig. 4 is a sectional detail taken on the line 4-4 of Fig. 2.

Fi 5 is a new of the lens holding pins and t e collar ap lied to one of them to hold the lens in an o lique position.

In carrying out the mvention, there is employed a tail stock sleeve 1 supported by the lathe in the, usual or any suitablemanner, and havin yfitted therein for sliding movement a tni .ntock spindle 2. This spindle 2isadvencedandretraeted for moving the lens likewise, and for this purpose, a .clamp 3 comprising a doubled strip embraces the sleeve 1 and has a clamping bolt 4 engaged through the outstanding ends thereof, a nut 5 being threaded upon the bolt, whereby when the nut is tightened, the terminals of the clamp 3 will be forced toward one another, thus causing the band of the clamp to tightly embrace the sleeve 1, it being preferable to provide a piece 6 of chamois or other suitable material upon the sleeve 1 within the clamp 3 whereby the clamp when tightened will be firmly held in place. By loosening the nut 5, the clamp 3 can be adjusted upon the sleeve 1. A link 7 has one end pivotally engaged upon the bolt 4 between the terminals of the clamp 3,

and has pivoted to its other end one end of a lever 8, which is provided with a yoke or loop 9 surrounding the spindle 2 and pivotally engaged therewith, as at 10, whereby angular adjustments upon the terminal 11 is a block or head 14 having a set screw 15 to. bear against the terminal 11 for holding the block 14 in any adjusted position, said set screw when loosened permitting the block 14 to be adjusted longitudinally upon the spindle 11 or to be rotated thereon J the desired angular position. The block 14; has a lug or extension 16 projecting outwardly therefrom arallel with the spindle 2, and projecting beyond the ,terminal 11 of thespindle.

' The block 14: cnries the means which is used for holding the lens, and for this purpose, a pin 17 extends through the lug 16 and is adapted to rotate therein, and a pair of parallel guide rods 18 are attached rigidly at certain ends to the ends of the pin 17 at the opposite sides of the lug 16. A transverse slide or cross 7 r 19 is slidable upon the rod 18, and is offset between the rods away from the lug 16 to accommodate the block 14 and terminal 11 of the spindle 2. The slide 19 is provided adjacent the ends thereof with outstanding pins 20. A second slide or crossbar 21 is slidabl'e upon the rods 18 farther remote from the';b'lock the lever 8 which crosses the spindle 2 can 7 pins 23, similar to the pins the cross bar 19 and those ends of the rods 18 which are secured to the pins 17, tending to move the cross bar 19 away from the block 11. Similar springs 26 are disposed upon the rods 18 between the sleeves 22 of the cross bar 21 and the free ends of said rods which are provided with apertures 27 for the reception of the resppctive ends of the springs 26. The springs 25 are weaker than the springs 26, whereby the tension of the springs 26 overcomes the tension of the springs 25 in order that the lens L will be moved toward the lug 16 when the lens 1s applied to the cross bars.

An adjusting screw 28 is threaded through the lug 16 at right angles with the spindle 2, and has a lock nut 29 thereon to bear against the lug 16 to hold the screw at any adjustment.

In using the attachment, supposing the sleeve 1 to be applied to the lathe, and the other parts assembled, the cross bars 19 and 21 are separated and the lens L is placed against the cross bars between the pins 20 and 23. It will be obvious to one skilled in the art that the device can be readily attached to a lathe by applying the sleeve 1 to the rail stock, clamp or other holder of the lathe so that the rotating drill of the lathe lies in a line coaxial with the spindle 2 which is movable toward and away from the drill. The sleeve 1 can be supported in any suitable manner to hold the device in position for cooperating with a drill, and the device need not be used solely on a lathe. After the lens is properly positioned upon the cross bars, the springs 26 will force the cross bars and lens toward the block or head 14 to thereby move the end of the lens past the terminal of the spindle 2. It will be noted that the rods 18 can be swung relative to the block 14: to facilitate the application of the lens to the device. By loosening the lock nut 29, the screw 28 can be adjusted to either move the lens L away 16, or to permit the lens to said lug, whereby to adjust the lens to the proper position for drilling. The set screw 15 is then loosened, and the block 14 adjusted to bring the lens rest or terminal 11 of the spindle 2 in such a position that the lens will contact therewith at the drilled, and the lever 8 can then advance the spindle 2 whereby carried against the drill (not shown) so that from the lug move closer to When it is desired to drill the aperture A of the lens L either above or below the so longitudinal axis a of the lens, the collar 24 is applied to the proper pin 23, so that the lens L rests against said collar 2 1 instead of resting against the pin 23, and this will serve to hold the lens in an oblique position, as as seen in Fig. 5, whereby the aperture will be drilled to one side of the axis a of the lens. The collar 24 being applicable to both pins 23, enables the aperture of the lens to be drilled either above nal axis.

Having thus described the invention, what is claimed as new is: 1. A lens drilling device embodying guidmg means, adjusting means for a lens, a pair 95 of lens holding members movable along the guiding means, spring means for moving one of said members away from'the adjusting means, and spring means for moving the other member toward the adjusting means, 100

said spring means moving said members toward one another, and the second mentioned spring means being of greater tension than the first mentioned spring means to move said members and toward the adjusting means.

A lens drilling device embodying a head, a lens adjusting screw carried thereby, guide rods pivoted to said head, a pair of lens holding members members toward one another and for moving them toward said adjusting screw.

3. A lens drilling device embodving a head, guide rods connected to said head,.a pair 0 lens holding members slidable upon said rods, spring means for moving one of said members away from the adjusting screw,

and spring means for moving the other membcr toward the adjusting screw, said spring means moving said members toward one another and the second mentioned spring means being of greater tension than the first mentioned when holding a lens toward the adjusting screw.

4. A lens drilling device embodying a spindle having a lens rest, a head adjustable thereon, guiding means spring pressed the lens W11 or below the longitudithe lens carried thereby slidable upon said -rods, and spring means for moving said an adjusting screw carried thereby spring means to move said members pivotally connected with said head, and lens holding means carried by said guiding means for adjustably supporting a lens.

5. A lens drilling device embodying a spindle having a lens rest, a head adjustable thereon having an outstanding lug, an ad justing screw carried by said lug, a pair of guide rods pivotally connected with the head, a pair of lens holding members slidahle upon said rods, spring means for movin g one oi said members away from the adjusting screw, and spring means for moving the other member toward the adjusting screw, said spring means moving said mem-' bers toward one another and the second mentioned spring means being stronger than the first mentioned spring means to move said members when holding a lens toward the adjusting screw. 7 r

6. A lens drilling device embodying a tail stock sleeve, a spindle slidable therein, means said pins being adapted to hold a lens, and 3 a collar adapted to be fitted on certain of said pins for the engagement of the lens whereby the lens will be held in an oblique position.

In testimony that I claim the foregoihg 'fii as my oWn, I have hereto aflixed my signa ture in the presence of two Witnesses.

GEORGE e. WoRsTALiI.

Witnesses: 1

DAVID U. BREWER, LOUIS W. TILTON. 

